Improvement in pumps



J. ROBERTS. lmproY-e'ment in'Pum'ps.

No, 119,650. Patenfed on; 3,1871.

AM FHOTO-UTHOGIFAPHM so Mr/ mam/1:3 Pam-51v UNITED $TATES JOHN ROBERTS,NEW MADISON, OHIO.

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 119,650, dated October3, 1871.

To all whom it may concern:

Be it known that 1, JOHN ROBERTS, of New Madison, in the county of Darkeand State of Ohio, have invented a new and useful Improvement in Pumps;and I do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawingforming part of this specification.

This invention relates to an improved mode of securing valves inpump-cylinders. I describe hereinafter the means for securing the valve,and also specify the construction of a pump-stock and cylinder such as Iprefer to use with my improvement.

In the accompanying drawing, Figure 1 is a longitudinal section. Fig. 2is a cross-section taken on the line 00 a: of Fig. 1. Fig. 3 is acrosssection on the line 3 y of Fig. 1, showing the valve.

Similar letters of reference indicate corresponding parts.

A is the stock. B is a casing around the stock. 0 represents air-cellsformed by the casing B. D is the cylinder. E is the valve. The casingsurrounds the stock, but is not in contact therewith, as seen in Fig. 2.There is an air-cell, O, on each side of the stock. This casing protectsthe stock from the sun and prevents its cracking or checking while theair is allowed to circulate through the cells. The cylinder D is placedbelow the frost, and the valve is placed in the bottom of the cylinder.F is an extension for connecting the upper stock with a lower stock orwith tubing. Near the lower end of the cylinder, on the inside, aresmall knobs g, beneath which the valve-plate h is confined. i is aspring, the ends of which are connected with the valve-plate. The bow Jof the spring is made to press against the side of the cylinder, whichholds the valve to its place by the friction thus produced. The valveplays freely inside of the spring, as seen in Fig. 3. The cylinder D isof cast-iron or other suitable metal.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The mode of securing the valve E in the cylinder bymeans of an annular plate, h, spring 23, and knobs g, substantially asdescribed.

Witnesses: JOHN ROBERTS.

M. ZUOK, A. L. NoRTHRoP.

